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Instant taxonomy: choosing adequate characters for species delimitation and description through congruence between molecular data and quantitative shape analysis
Citation
Karanovic, T and Lee, S and Lee, W, Instant taxonomy: choosing adequate characters for species delimitation and description through congruence between molecular data and quantitative shape analysis, Invertebrate Systematics, 32, (3) pp. 551-580. ISSN 1445-5226 (2018) [Refereed Article]
Copyright Statement
Copyright 2018 CSIRO
DOI: doi:10.1071/IS17002
Abstract
The lack of university funding is one of the major impediments to taxonomy, partly because traditional taxonomic training takes longer than a PhD course. Understanding ranges of phenotypic variability for different morphological structures, and their use as characters for delimitation and description of taxa, is a tedious task. We argue that the advent of molecular barcoding and quantitative shape analysis makes it unnecessary. As an example, we tackle a problematic species-complex of marine copepods from Korea and Japan, approaching it as a starting taxonomist might. Samples were collected from 14 locations and the mitochondrial COI gene was sequenced from 42 specimens. Our phylogenetic analyses reveal four distinct clades in Korea and Japan, and an additional nine belonging to a closely related complex from other parts of the Northern Pacific. Twenty different morphological structures were analysed for one Japanese and two Korean clades using landmark-based two-dimensional geometric morphometrics. Although there is no single morphological character that can distinguish with absolute certainty all three cryptic species, most show statistically significant interspecific differences in shape and size. We use five characters to describe two new species from Korea and to re-describe Tigriopus japonicus Mori, 1938 from near its type locality.
Item Details
Item Type: | Refereed Article |
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Keywords: | barcoding, Copepoda, geometric morphometrics, Harpacticidae, integrative taxonomy |
Research Division: | Biological Sciences |
Research Group: | Evolutionary biology |
Research Field: | Animal systematics and taxonomy |
Objective Division: | Expanding Knowledge |
Objective Group: | Expanding knowledge |
Objective Field: | Expanding knowledge in the biological sciences |
UTAS Author: | Karanovic, T (Dr Tomislav Karanovic) |
ID Code: | 131870 |
Year Published: | 2018 |
Web of Science® Times Cited: | 14 |
Deposited By: | Ecology and Biodiversity |
Deposited On: | 2019-04-10 |
Last Modified: | 2019-07-30 |
Downloads: | 0 |
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